$ git clone -n https://src.fedoraproject.org/rpms/rust-strum0.21.git /var/lib/mock/f45-build-45223-821/root/chroot_tmpdir/scmroot/rust-strum0.21
Cloning into '/var/lib/mock/f45-build-45223-821/root/chroot_tmpdir/scmroot/rust-strum0.21'...
$ git fetch origin 062d6b2a68db59889ff1d25aabb3ce650fce58b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-strum0.21
 * [new ref]         062d6b2a68db59889ff1d25aabb3ce650fce58b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 062d6b2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild